/*
   Copyright (c) 2011 Mizar Tools Contributors (mizartools.org)

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
/*  Contributors :
 *	2011-02-05 Marco Riccardi - initial implementation
 *  2011-03-25 Marco Riccardi - implementation of visitor pattern
 *
 */
package org.mizartools.system.xml;

import java.util.LinkedList;

import org.mizartools.system.ElementParseException;
import org.mizartools.system.IElement;
import org.mizartools.system.INode;
import org.mizartools.utility.xml.XMLElement;

public class SignatureWithCounts implements IElement {

    public static final String NAME = "SignatureWithCounts";

    private INode parentNode;

    private LinkedList<ConstrCounts> constrCountsList = new LinkedList<ConstrCounts>();

    private SignatureWithCounts(INode parentNode){
        this.parentNode = parentNode;
    }

    public INode getParentNode() {
        return parentNode;
    }

    public static SignatureWithCounts newInstance(INode parentNode, LinkedList<XMLElement> xmlElementList) throws ElementParseException {
        SignatureWithCounts signatureWithCounts = new SignatureWithCounts(parentNode);
        XMLElement xmlElement = xmlElementList.poll();
        if (!xmlElement.getName().equals(NAME)){
            throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a " + NAME, xmlElementList);
        }

        if (!xmlElement.isEmpty()){
            while (true){
                xmlElement = xmlElementList.peek();
                if (xmlElement == null){
                    throw new ElementParseException(ElementParseException.UNEXPECTED_END_OF_FILE, "Unexpected end of XMLElement list");
                }
                if (xmlElement.getName().equals(NAME) && xmlElement.isEndElement()){
                    xmlElement = xmlElementList.poll();
                    break;
                }
                if (xmlElement.getName().equals("ConstrCounts")){
                    signatureWithCounts.constrCountsList.add(ConstrCounts.newInstance(signatureWithCounts, xmlElementList));
                } else 
                    throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "The XMLElement " + xmlElement.getName() + " is not valid in " + NAME, xmlElementList);
            }
        }

        return signatureWithCounts;
    }

    public LinkedList<XMLElement> getXMLElementList() {
        LinkedList<XMLElement> xmlElementList = new LinkedList<XMLElement>();
        XMLElement xmlElement = new XMLElement(NAME);
        boolean isEmpty = !(!constrCountsList.isEmpty());
        xmlElement.setEmpty(isEmpty);
        xmlElementList.add(xmlElement);
        for (ConstrCounts constrCounts : this.constrCountsList){
            xmlElementList.addAll(constrCounts.getXMLElementList());
        }
        if (!isEmpty) { 
            xmlElement = new XMLElement(NAME);
            xmlElement.setEndElement(true);
            xmlElementList.add(xmlElement);
        }
        return xmlElementList;
    }

    public LinkedList<ConstrCounts> getConstrCountsList(){
        return constrCountsList;
    }

	@Override
	public void accept(Visitor visitor) {
		if (visitor.visit(this)) {
			for(ConstrCounts constrCounts: this.constrCountsList) {
				constrCounts.accept(visitor);
			}
		}
		visitor.endVisit(this);
	}

	@Override
	public String toString(){
		ToStringVisitor toStringVisitor = new ToStringVisitor();
		this.accept(toStringVisitor);
		return toStringVisitor.toString();
	}

}
